This is a model commemorating the 90th anniversary of the founding of Mita Sanshodo. Based on the Platinum Izumo series, the wood is walnut. Nib: 18K M (medium) with serial number Cap and body: wood (walnut) urethane coating (matte finish) Size: Maximum diameter 15.5mm Total length (when stored) approx. 163mm Weight: Approx. 36g Paulownia box included Includes pen case, converter, ink cartridges, and warranty card The Tenwa era, known as the good governance of the early Edo period, is known as the achievement of the fifth shogun, Tsunayoshi, who ruled the Tatebayashi domain. By eliminating the brutal atmosphere of the Warring States period and fostering Genroku culture, this period gave birth to rare intellectuals such as Chikamatsu Monzaemon, Ihara Saikaku, and Matsuo Basho. Our company (Mita Sanshodo) was founded in 1928 in Tatebayashi City, Gunma Prefecture, and is celebrating its 90th anniversary. The original commemorative fountain pen, \”Genroku Shogun,\” was created by the artisans at Platinum Pen, which produces fountain pens at its nearby Isesaki factory.Walnut, a rare material for wooden fountain pens, is specially processed to create a masterpiece that highlights the unique wood grain of each pen. [Walnut] Walnut is a high-quality wood that is said to be one of the three most famous woods in the world, along with teak and mahogany. It is shock-resistant, heavy, and has little warping, and is easy to process, and above all, it has a beautiful appearance, making it often used for high-end furniture and crafts. It also contains a moderate amount of oil, so the more you touch and use it with your hands, the more you can enjoy the changes that occur over time.Walnut is a high-quality wood that was once considered a symbol of wealth in the West. It remains popular even today, and is used in the US presidential podium and Milan Cathedral. This fountain pen is made of walnut wood with a matte urethane finish. The more you use it, the more lustrous it will become, making it a masterpiece you can cherish for a long time. The Genroku Shogun (Walnut) is made with high quality walnut lumber. Each pen is made to accentuate the unique grain of the wood used, and no two are the same. Treated with polyurethane and given a matte finish, this pen elevates any workspace, and the finely crafted Medium nib puts down a robust line with little pressure. Produced in a limited run of 100, each pen is engraved with its unique production number. Product:Fountain PenMaterial:Walnut woodNib:18k gold, MediumConverter:Included